1 files changed, 72 insertions, 0 deletions
diff --git a/js/src/tests/non262/Reflect/setPrototypeOf.js b/js/src/tests/non262/Reflect/setPrototypeOf.js
new file mode 100644
index 0000000000..ed7857a028
--- /dev/null
+++ b/js/src/tests/non262/Reflect/setPrototypeOf.js
@@ -0,0 +1,72 @@
+/* Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/licenses/publicdomain/ */
+
+// Reflect.setPrototypeOf changes an object's [[Prototype]].
+var obj = {};
+assertEq(Object.getPrototypeOf(obj), Object.prototype);
+var proto = {};
+assertEq(Reflect.setPrototypeOf(obj, proto), true);
+assertEq(Object.getPrototypeOf(obj), proto);
+
+// It can change an object's [[Prototype]] to null.
+obj = {};
+assertEq(Reflect.setPrototypeOf(obj, null), true);
+assertEq(Object.getPrototypeOf(obj), null);
+
+// The proto argument is required too.
+obj = {};
+assertThrowsInstanceOf(() => Reflect.setPrototypeOf(obj), TypeError);
+
+// The proto argument must be either null or an object.
+for (proto of [undefined, false, 0, 1.6, "that", Symbol.iterator]) {
+    assertThrowsInstanceOf(() => Reflect.setPrototypeOf(obj, proto), TypeError);
+}
+
+// Return false if the target isn't extensible.
+proto = {};
+obj = Object.preventExtensions(Object.create(proto));
+assertEq(Reflect.setPrototypeOf(obj, {}), false);
+assertEq(Reflect.setPrototypeOf(obj, null), false);
+assertEq(Reflect.setPrototypeOf(obj, proto), true);  // except if not changing anything
+
+// Return false rather than create a [[Prototype]] cycle.
+obj = {};
+assertEq(Reflect.setPrototypeOf(obj, obj), false);
+
+// Don't create a [[Prototype]] cycle involving 2 objects.
+obj = Object.create(proto);
+assertEq(Reflect.setPrototypeOf(proto, obj), false);
+
+// Don't create a longish [[Prototype]] cycle.
+for (var i = 0; i < 256; i++)
+    obj = Object.create(obj);
+assertEq(Reflect.setPrototypeOf(proto, obj), false);
+
+// The spec claims we should allow creating cycles involving proxies. (The
+// cycle check quietly exits on encountering the proxy.)
+obj = {};
+var proxy = new Proxy(Object.create(obj), {});
+
+assertEq(Reflect.setPrototypeOf(obj, proxy), true);
+assertEq(Reflect.getPrototypeOf(obj), proxy);
+assertEq(Reflect.getPrototypeOf(proxy), obj);
+
+// If a proxy handler returns a false-y value, return false.
+var hits = 0;
+proto = {name: "proto"};
+obj = {name: "obj"};
+proxy = new Proxy(obj, {
+    setPrototypeOf(t, p) {
+        assertEq(t, obj);
+        assertEq(p, proto);
+        hits++;
+        return 0;
+    }
+});
+
+assertEq(Reflect.setPrototypeOf(proxy, proto), false);
+assertEq(hits, 1);
+
+// For more Reflect.setPrototypeOf tests, see target.js.
+
+reportCompare(0, 0);